Jitter and shimmer differences between pathological voices of school children
نویسندگان
چکیده
A study was undertaken to determine differences between jitter and shimmer in voices of children with different syndromes. Voices of 60 children, both sexes, aged 7-12 years were analysed by EZ Voice Analysis Software (program for jitter and shimmer measuring). The main purpose of this paper has diagnostic background. Obtained results show, which acoustical indicators of pathological voice are in certain group of children, and in which shapes they appear. In that way, we try to find easiest way to explain acoustical characteristics of different voice pathologies as help in diagnostics. The results indicate that the children with stuttering and disartric symptoms have higher values almost in all applied variables than the average values of children from other groups. Children with Down syndrome and hearing losses exhibited the most disordered voice quality. Finally, the mixed group (stuttering with dysphonia) and group of children with dysphonia exhibited the least pathological characteristics of voice. Obtained results of Analysis of Variance have shown significant statistical differences in all applied variables among the groups.
منابع مشابه
Vocal Parameters of Adults with Down Syndrome in Zahedan /Iran
Background & Aims: Previous studies have indicated significant differences in vocal parameters between children with Down syndrome and normal children, but there are challenges about these differences. In this study vocal parameters and Maximum Phonation Time (MPT) in adults with Down syndrome have been investigated. Method: This cross-sectional and analytic study was performed on 22 adults wit...
متن کاملJitter, Shimmer, and Noise in Pathological Voice Quality Perception
Although jitter, shimmer, and turbulent noise characterize all voice signals, their perceptual importance has not been established psychoacoustically. To determine which of these acoustic attributes is important in listeners’ perceptions of pathologic voices, listeners used a speech synthesizer to adjust levels of jitter, shimmer, and noise so that synthetic voices matched natural pathological ...
متن کاملPerception of aperiodicity in pathological voice.
Although jitter, shimmer, and noise acoustically characterize all voice signals, their perceptual importance in naturally produced pathological voices has not been established psychoacoustically. To determine the role of these attributes in the perception of vocal quality, listeners were asked to adjust levels of jitter, shimmer, and the noise-to-signal ratio in a speech synthesizer, so that sy...
متن کاملJitter and shimmer measurements for speaker recognition
Jitter and shimmer are measures of the cycle-to-cycle variations of fundamental frequency and amplitude, respectively, which have been largely used for the description of pathological voice quality. Since they characterise some aspects concerning particular voices, it is a priori expected to find differences in the values of jitter and shimmer among speakers. In this paper, several types of jit...
متن کاملImmediate effects of vocal warm-up exercises on elementary teachers' voice
Introduction: Teachers are a large group of professional voice users who are exposed to many voice problems. Vocal warm-up exercises (VWUE) can prepare the muscles involved in vocalization before teaching and can reduce voice damage in teachers. However, limited studies have examined the effects of VWUE on teachers' voices. Therefore, the present study was conducted to investigate the immediate...
متن کامل